I believe the weekend course book has all the same concepts and everything as the logic games bible, but it doesn't go as indepth with practice problems. I think it would probably be to your advantage to buy the lgb and work through it before your course. That way the concepts are more of a review for you.

As far as the logical reasoning bible goes, I think it's going to be really good. I took the powerscore full length course back in April and the first few chapters were online for us to use.

Before I took PS, I had done quite a few practices tests from 10 Actual lsat preptests and 10 more preptests that lsac publishes and I didn't have a problem with being too familar with the questions in class at all. Rachelb1 is right in that the same stimulus may show up with a completely different question.

You are correct, it's because of the empty table. Because in that situation p/q would have have to be at tables 1 or 2 (doesn't matter which) then M would be at 3. So, O can't sit at table 4 because that would force N (N can't be at 3,5, or 7) to sit at table 6 leaving tables 5 or 7 to still be filled. Since L is the only variable left tables 5 or 7 would be left vacant (according to the rules 5,6,7 can't be empty).

You may want to make sure that you'll be at a test center with adequate desk space. If you find out that you'll be in a lecture hall with flip top desks, I've heard you're allowed to bring in a small board to give yourself more room to work. You might feel stupid carrying it, but if you need it by all means do it.

I took the powerscore weekend course and it would probably be to your advantage to to some studying before you go. You could work through the logic games bible, if you haven't already, to get a feel for powerscore's method in approaching the games.